Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/78061
Citations
Scopus Web of Science® Altmetric
?
?
Type: Journal article
Title: Distribution of mycorrhizal fungus associated with the endangered pink-lipped spider orchid (Arachnorchis (syn. Caladenia) behrii) at Warren Conservation Park in South Australia
Author: Feuerherdt, L.
Petit, S.
Jusaitis, M.
Citation: New Zealand Journal of Botany, 2005; 43(2):367-371
Publisher: Taylor & Francis
Issue Date: 2005
ISSN: 0028-825X
1175-8643
Statement of
Responsibility: 
Leah Feuerherdt, Sophie Petit and Manfred Jusaitis
Abstract: Ex situ seed baiting of a population of Arachnorchis (syn. Caladenia) behrii at Warren Conservation Park was conducted to determine the distribution of this orchid's mycorrhizal fungus (or fungi) and whether it was limiting the distribution of the orchid. Forty‐five samples of topsoil and organic matter were collected systematically from within and outside the orchid population. All samples were baited with A. behrii seeds and incubated for 8 weeks to assess germination. Seeds from 24 samples out of 45 (53%), from both within and outside the orchid population, reached stage‐two germination (seed coat cracked, protocorms swelling), but a fungus later killed five samples. Seeds from three samples (7%) reached stage‐three germination (seed coat shed, rhizomes developing). Clearing and staining of seeds revealed that mycorrhizal fungus was present in all samples that had reached stage‐two or stage‐three germination. Mycorrhizal fungus was distributed independently of the orchids, and, thus, the distribution of A. behrii, which depends on mycorrhizal fungus, did not appear to be limited by the distribution of mycorrhizal fungus. Further research must focus on the inoculum potential and efficacy of the fungus/fungi in situ over a longer time period, as well as other ecological aspects of the orchid's natural history, to identify the reason(s) for its rarity.
Keywords: Arachnorchis behrii; Caladenia behrii; mycorrhizal fungus distribution; orchid abundance; orchid conservation
Rights: © The Royal Society of New Zealand 2005
RMID: 0030000524
DOI: 10.1080/0028825X.2005.9512961
Appears in Collections:Earth and Environmental Sciences publications

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.